Hi Angelo,
Thank you so much for your advice.
Shame on me.
I didn't realize that error was from the set.
It works now.
Sorry for having such a stupid question.
On Wed, Sep 29, 2021 at 3:19 PM Angelo Polo
wrote:
> Hi Yu-Wei,
>
> Collections#emptySet returns an immutable Set, so it should be
>
Hi Yu-Wei,
Collections#emptySet returns an immutable Set, so it should be
mutations.add(mutation);
that's throwing the UnsupportedOperationException rather than anything
related to C*.
If you're going to add something to a set later, use the regular
constructor. Most likely HashSet:
new HashSet<>
Hi,
I am thinking of using the Cassandra trigger to delete or update data right
after they are inserted.
First, I tried deleting the data.
This is my table.
```
CREATE TABLE mykeyspace.mytable (
mycolumn text PRIMARY KEY
)
```
and this is my trigger
```
public class MyTrigger implements I
